Abstract

Abstract From a comparative lattice dynamical study of different reconstruction models, it is concluded that the following model gives the best explanation of the previously measured surface phonon dispersion curves for the p(2 × 1)ONi(110) system: each oxygen atom sits in a slightly asymmetric adsorption site near the long-bridge position, at a height of 0.56 A above the nearest nickel row, such that the local symmetry of the system is C s with the symmetry axis along the 〈110〉 direction; the substrate undergoes a missing-row reconstruction.

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